Egg-shape data of six species of poultry

We digitized the side profiles of 2221 eggs of six species of poultry, two species of Anatidae (Anas platyrhynchos domesticus and Anser cygnoides domesticus) and four species of Phasianidae (Alectoris chukar domesticus, Coturnix japonica domesticus, Gallus gallus domesticus, and Phasianus colchicus domesticus), and used an explicit re-expression of Preston's equation (referred to as EPE hereinafter) to fit the planar coordinates of each egg profile. By using the estimated parameters, we calculated the volume and surface area of each egg. The black_white.rar file saves the black and white .bmp images at 600 dpi for the 2221 egg profiles. The edge_data.zip file includes the planar coordinates (in cm) of each of the 2221 egg profiles, and the EPE.csv file includes the estimated parameters and goodness-of-fit of the EPE, and the egg surface area and volume calculated by the surface area and volume equations of the solid of revolution based on the EPE for each egg. In addition, the EPE.csv file also provided the measured volumes of 120 A. cygnoides eggs, and 366 P. colchicus eggs using the graduated cylinders. For each species of poultry, we boiled 120 eggs that were randomly sampled, and then measured the mass of albumen, yolk, and shell of boiled eggs. The results were saved in the EPE.csv file.